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' To 1U vwhom i may con f Yb v the opening of course mii to 'in Be it known ibut a citizen of the Unife We? Chicago, in the conn'iy io llnois, have invented ee useful improvements in. E @n for Sheet-Metal Cm: 'ien C which the folowing is a sI .e

'Mv invention rele n has foi' is object structure that may be emmngzlggeoin poyed when the cui' As o phot/*inse sheet metal ends, i wooden ends, and env, zoo

It has been propose@ for example, with end sheet mea' instead of the sheet or shes-is inem?.

end with Coiigations T5 rigidify the struetme.

this ehu-acier is shox No. 1,031,541, granite@ JL* objection to consuctien metal, ends has been tiel"- requre, their box ears lOis shown as foinee :is well as die usual side i* :ribs lf3 which prepiercing of thev snees` mei; Hyg min boeit/onwil? openings of a size o "1 eoin side to side of tends to 'weaken smh stm 131V is oieeeo with. e them unfit for the heed use C es're eong un- Wuy cars :we subjgecee. i.. en. lhe oorrugating the sheefa me' open] or forming the seme m .A heet isv when these ooirugations or ribs {ienge L erable, extend foin side )go .113mb top to bottom of te endQ is ifzni By-izilis stresses to the fiume-Work of Jone can on the in the end is pierced by a oo'f openA bs are tensf3.5

i ooi-migrations or ribs which F function und are graeieeiljf uselessc ized. The

My invention provides n door sti" (by which te'm mean to ineluoe "1?"- and also Jdie devices an@ eonsruedions sthe end 'with which be door is e? f. e

of such n character mi elle can sii-mdels, n@ being,

mnt-eriniy weakened bee-@use of @ne eio nii ini ,ng :is .if

ine' fonned therein. 2 in; door The invention has for Vif! i oep l@ to provide n door which een ci with a fieno. T "viiieiioveiiaps he sited` und which9 when made of wood of eine i'elativey :1 perfectly Waterproof ai ooinpiessibie material. The ier llo openin'. .n ne edge of iengge @n ogcfo-v The invention is ihszia es of ne ooiI opening; effe ehe suds 19, 20 mounted on plates 21 riveted to'the sheet 10. A- strap or bar 22 extends across the door. The ends of the strap are formed with the slots 23. The stud 19 preferably has a head 24 and is put through the'slot`23 in one end of the bar before being secured to its plate 21. The slots 23, or at l'east one of them, are elongated so that after the door has been closed the free end of bar 22 may bev slipped over the end of the stud 20. The studs 19 and 20 are provided with the nuts 25 by means of which the bar 22 may be made to force or clamp the door against the flange 15. The door may or may not be secured to the bar 22 as may be deemed desirable.

While I have described my invention in the preferred embodiment it will be readily understood that some modifications thereof might be made without departure from the invention. Therefore I do not limit myself to the particularsl of construction described and shown except so far as the same are made specific limitations in certain of the claims hereof, -my purpose being to claim both broadly and narrowly whatever patentable novelty my door structure may possess in view'of the state of the prior art.

I claim: -f

v1. The combination with a sheet meta wall structure formed with corrugations, with a circular door opening intercepting one or more of said corrugations and with a circular depression around said opening providing an outstanding flange, of a' Adoor formed with an` inturned rim which overlapssaid flange and provided with a relatively compressible lining, which bears against said flange, a strap adapted to extend diametrically across said door, and means for securing the yends of said strap to an intercepted corrugation on opposite sides of said opening so as to press the'door against said flange. i y

2. The combination with a sheet metal wall structure formed with corrugations and with a door opening intercepting one or more of said corrugations, of an outwardly extending continuous flange on said structu-re surrounding the opening therein arranged to transmit stresses aroundthe opening, adoor which bears against said flange and closes the opening, a strap extending across the door, and means for securing the 'ends of the strap to said sheet met'al wall structure.

3. The combination with a. sheet metal wall structure formed with corrugations and with sa door opening intercepting one or more of-said eorrugations, of a continuous flange on said structure surrounding the opeinng therein and arranged to transmit stresses around said opening, a door which bears against said end structure closing the opening therein, a stra extending across the door parallel with said corrugations, and y means for securing the ends of the strap to an intercepted corrugation on opposite sides.`

45. The combination of a corrugated sheet 'of metal having an opening formed therein intercepting corrugat1ons thereof, a continuous flange struck up in said sheet about said opening, a door having a continuous flange fitting closely about said opening flange, and means for removably securingsaid door over the opening. f 6. An end structure lfor cars compusing a flat, corrugated sheet metal panel adapted to be secured for support to the frameof a car and provided at a place remote from its points of support lwith an aperture which intercepts certain of the corrugations, a continuous flange formed'in the panel about said aperture, a flanged door for the aperture, there `being a telescopic engagement `between said aperture and door flanges,- and means formaintaining said engagement.

7. An end structure for cars comprising a fiat, corrugated sheet metal panel adapted to be secured for support to the frame of a car and provided at a place remote from its points of supportwith a circular aperture which intercepts certain of the corrugations, a continuous circular'llange formed in the,

panel about said aperture, a circularly flangeddoor for the aperture, there being telescopic engagement between said aperture and'door flanges, and means for maintaining said engagement.

WALTER P.. MURPHY.

Witnesses:

HARRY W. STANNARD, JosEPHINE A. HA-RTNETT. 

